博碩士論文 982206016 詳細資訊


姓名 曾冠翔(Quan-Hsiang Tseng)  查詢紙本館藏   畢業系所 光電科學與工程學系
論文名稱 以電光非週期性晶格極化反轉鈮酸鋰晶體應用於雙波長雷射系統之腔內布拉格繞射元件之設計與研究
(Aperiodic Poled Lithium Niobate Electro-optic Bragg Deflector as an Efficient Laser Q-switch in a Dual-wavelength Solid-State Laser)
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摘要(中) 布拉格繞射對於波長有敏銳的選擇性,對單一布拉格周期而言,僅可對單一波長產生繞射之效應(此處僅考慮第一階)。本論文中創新以模擬退火演算法,計算一非週期性結構,可滿足參銣雷射系統中兩種發射頻譜1064nm 與1342 nm 的繞射條件,在相同入射角度情況下,達到高效率且相同布拉格角度的繞射情形。
  本實驗中,利用鈮酸鋰晶體良好的電光效應,以高電場週期性極化反轉的技術,將前述所計算的非週期性結構,製作於一長4公分,寬5釐米,厚500微米的鈮酸鋰晶體上完成該繞射元件的製作。
  我們在外加最低z方向電場為120V時,量測到高繞射效率;1064nm 為93.5%,1342nm 為92.5%。進一步將其放置於Nd:YVO4固態雷射系統中,以電訊號進行脈衝調製,以BIBO和頻晶體進行1064nm 與1342nm 的和頻機制,達成短脈衝且高功率的橘黃光輸出,其脈寬為9.7奈秒,尖峰功率約為167瓦特。
摘要(英) Bragg condition is very sensitive to incident wavelength. With this characteristic, we can diffract wavelength with appropriate Bragg structure. In this letter, we first design an aperiodic structure with the help of simulated anneal algorism which compensates reciprocal vectors of dual wavelength emitted in Nd doped solid state laser system.
Lithium Niobate is a great electro-optic crystal. With the technics of high electric field poled, we can generate the structure we calculate previously on LN crystal. Thus, a 40 mm long, 5 mm in width and thickness of 0.5 mm aperiodic poled Lithium Niobate Bragg diffraction device is fabricated successfully.
In experiment, we measured the high diffraction efficiency both on 1064 nm and 1342 nm, 93.5% and 92.5% respectively, at 120 volt applied voltage. Furthermore, we put our chip into the Nd:YVO4 slid sate laser system and applied a periodic electric field to the chip, we can turn it into a cavity Q-switch device. With the sum frequency crystal BIBO, we can generate narrow and high peak power 593 nm output from dual emission wavelength of Nd 1064 nm and 1342 nm. In results, the yellow-orange light output with the pulse width of 9.7 ns and peak power of 167 W under 8.142 W of Nd absorption power.
關鍵字(中) ★ 布拉格繞射
★ 鈮酸鋰
關鍵字(英) ★ Bragg Deflector
★ Q-switch
★ Lithium Niobate
論文目次 摘要 I
Abstract II
圖目錄 V
表目錄 IX
致謝 X
第一章 緒論 1
1-1 發展與歷史 1
1-2 鈮酸鋰晶體 (Lithium Niobate, LiNbO3) 3
1-3 研究動機 4
1-4 內容概要 9
第二章 理論分析 10
2-1 鈮酸鋰晶體之電光效應 (Electric-optical effect) 10
2-2 布拉格繞射 (Bragg diffraction) 15
2-3 共振腔調制 (Cavity Q-switch) 19
2-4 和頻機制 (Sum Frequency Generation, SFG) 24
第三章 元件設計與製程 29
3-1 雙波長布拉格繞射元件設計 29
3-2 雙波長布拉格繞射元件製備 36
第四章 實驗與結果 39
4-1 繞射效率量測 39
4-2 Q調制短脈衝雷射特性量測 46
第五章 結論與未來展望 49
5-1 結論 49
5-2 未來展望 50
第六章 參考文獻 52
參考文獻 [1] Physics Today, pp.72 Oct. 2007
[2] J. A. Giordmaine, “Mixing of light beam in crystal”, Phys. Rev. Lett. 8, 19–20 (1962)
[3] W. H. Zachariasen,Skr. Norske Vid-Ada.,Oslo,Mat. Naturv. No.4 (1928)
[4] B. T. Matthias and J. P. Remeika, “Ferroelectricity in the illmenite structure”,Phys. Rev. 76 (1949) 1886.
[5] A. A. Ballman, “Growth of piezoelectric and ferroelectric materials by the Czochralski technique”, J. American Ceram. Soc. 48 (1965) 112.
[6] 胡明理, ” Zn:LiNbO3 之晶體生長與其特性研究”, 中央大學(2004)
[7] k.w. Su, y.t. Chang, y.f. Chen, “Power scale-up of the diode-pumped actively Q-switched Nd:YVO4 Raman laser with an undoped YVO4 crystal as a Raman shifter”, Appl. Phys. B 88, 47–50 (2007)
[8] Yung-Fu Chen, S. W. Tsai, “Diode-pumped Q-switched Nd:YVO4 yellow laser with intracavity sum-frequency mixing”, March 15, 2002 / Vol. 27, No. 6 / OPTICS LETTERS
[9] George A. Henderson, "A computational model of a dual-wavelength solid-state laser", J. Appl. Phys. 68(11), 5451(1990)
[10] Y. Y. Lin, S. T. Lin, G. W. Chang, A. C. Chiang, and Y. C. Huang, Y. H. Chen, “Electro-optic periodically poled lithium niobate Bragg modulator as a laser Q-switch”, March 1, 2007 / Vol. 32, No. 5 / OPTICS LETTERS
[11] S. T. Lin, G.W. Chang, Y.Y. Lin, Y.C. Huang, A.C. Chiang and Y.H. Chen, “Monolithically integrated laser Bragg Q-switch and wavelength converter in a PPLN crystal”, Optics Express, Vol. 15, Issue 25, pp. 17093-17098 (2007)
[12] H. Hellwig _, J. Liebertz and L. Bohat´y, “EXCEPTIONAL LARGE NONLINEAR OPTICAL COEFFICIENTS IN THE MONOCLINIC BISMUTH BORATE BiB3O6 (BIBO)”, Solid State Communications, Vol. 109, No. 4, pp. 249–251, 1999
[13] 張煒堃碩士論文, “以串級式電光週期性晶格極化反轉鈮酸鋰達成三波長主動式Q-調制Nd:YVO4雷射”, June, 2007
[14] 陳彥良碩士論文, “高效率雙Nd:YVO4 雷射和頻黃光產生系統”, June, 2007
[15] 張錫雄碩士論文, " 以單塊二維週期性晶格極化反轉鈮酸鋰同時作為Nd:YVO4雷射之電光Q調制器和腔內光參量振盪器”, 2010
[16] Amnon Yariv, Pochi Yeh, “Optical Waves in Crystals”, 1984
[17] Orazio Svelto, David C.Hanna, “Principle of Laser”, 1989
指導教授 陳彥宏(Yen -Hung Chen) 審核日期 2011-8-26

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